Title :
Composite step-graded collector of InP/InGaAs/lnP DHBT for minimised carrier blocking
Author :
Chor, E.F. ; Peng, C.J.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
fDate :
7/18/1996 12:00:00 AM
Abstract :
A composite step-graded collector of InP/InGaAs/InP DHBT has been investigated for minimised carrier blocking. The optimised collector has the following sub-layers: a 100 Å n- InGaAs layer; three 200 Å n- InGaAsP layers; and a 100 Å, n=3×1017 cm-3 InP layer, and the rest are n - InP. The InGaAsP layers should be chosen to give approximately equal band offset at the heterointerfaces
Keywords :
III-V semiconductors; carrier mobility; gallium arsenide; heterojunction bipolar transistors; indium compounds; semiconductor heterojunctions; 100 angstrom; 200 angstrom; DHBT; InP-InGaAs-InP; composite step-graded collector; double heterojunction; equal band offset; heterointerfaces; minimised carrier blocking;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960889